| abstract |
(57) Abstract: (a) It is obtained by a first step of producing a propylene polymer component (PP) and a second step of producing a propylene-ethylene copolymer component (EP) using a metallocene catalyst. (B) 0.01 to 1 part by weight of a phosphorus-based antioxidant, (c) a hindered amine-based weathering agent and / or a saturated dialkylhydroxylamine with respect to 100 parts by weight of a propylene-based block copolymer having specific physical properties. A propylene-based block copolymer composition containing 0.005 to 1 part by weight of a compound. [Effect] A molded article having excellent rigidity and heat deformation resistance, excellent impact resistance at low temperatures, good resistance to ductile destruction even after sterilization, and good discoloration resistance that does not easily impair designability. . This molded article is particularly useful as a container or packaging material in the food and medical fields. Furthermore, a composite molded article laminated or bonded with another material has excellent durability. |